Machine for filing saws



(ModeL) W. 11. SHUTTER MACHINE FOR FILING SAWS.

Patefited Jan. 31,1882."

I INVENTOR:

ATTORNEYS.

carrying a springand-pawl-actuated bent arm ch auged vertically.

NITED STATES PATENT Orrieie.

WILLIAM H. SHUTTE, OF EMPORIA, KANSAS.

MACHINE FOR FILING SAWS.

SPECIFICATION forming part of Letters Patent No. 251,959, dated January 3, 1882. 1 Application filed April o, 1881. (Model) To all whom it may concern:

Be'it known that I, WILLIAM H. SHUTTE, of Emporia, in the county of Lyon and State of Kansas, have invented a new and useful Improvement in Machines for Filing Saws, of which the following is a full, clear, and exact description.

The object of this invention is to provide a saw-filer better adapted to secure the accurate gaging of the depth of the saw-teeth, the equal action of the file on the saw-teeth throughout the whole length of the file, the automatic feeding of the file, and its adjustment for any desired angle or pitch of teeth.

The invention consists of a sliding carriage that serves as a gage for the depth of the sawteeth, and at the same time to support the fileframe; and it consists, further, of an adjustable clamp secured on the bent arm for the direct support of the file-frame so constructed that the direction of the said frame and file can be Figure 1 is a side elevation'of the device, partly in section, in position on a saw-clamp. Fig. 2 is a front elevation of the same, partly in section, and with parts broken away to ex hibit other parts. Fig. 3 is a sectional elevation of the file'frame-supporting clamp in position on line z 2, Fig. 1. Fig.4 is a sectional elevation on line a: m, Fig. 2. Fig. 5 is a sectional elevation on line y y, Fig. 1. Fig. 6 is a plan of the file-frame-supportin g clamp in position. Fig. 7 is a perspective view of the dog for regulating the feed of the tile. Fig. 8 is a side elevation, indicating a circular or convex shaped saw'hld in a clamp to which the improved device may be applied.

Similar letters of reference indicate corresponding parts.

In the drawings, A represents a saw-clamp, consisting of two blocks held together by screws or other convenient devices in the usual manner, and holding between them a saw, B; On their outer faces these blocks are longitudinally grooved, as shown at b, for the reception of the lower edges ofthe guides c, that hold the carriage C, so that it will freely slide on the top of said clamp A.

The carriage 0 consists of two blocks, 0 0

set on edge parallel with each other, and held apart by smaller blocks 62 01. These parts of the carriage O are held together by screws or bolts f f, or other suitable device.

An arm, D, consisting of a stout rod having ;be turned against the said arm D, to adjust the screw-threaded end thereof relatively to the top of said clamp A.

A spring, D, fixed within the carriage G, is held against the inner bent end of the arm D by a screw orstud, g and serves, under conditions hereinafter set forth, to restore said arm D to its normal position. On the other perpendicular end of the arm 1) is the clampingblock E, that holds the file-frame H, said arm D being entereddown through a vertical mortise, h, in saidblock E, one side of which mortise h presents a central pivoting-point, i, by means of which the said block E is pivoted so as to .be adjustable in a vertical plane, so that the file G may be inclined to anydesired degree from thehorizontal across the face of the saw. The set-screws 70 hold the block 'E on the arm D, and by setting up the one and loosening the other set-screw 7c the desired vertical inclination may be given totl'ne file G.

As a means for gaging the pitch of the sawteeth, a flanged plate, S, provided with radial graduations t, is slipped over the arm D upon the clamping-block E, and a mark, t, is made on the arm D to serve as a pointer, whereby the angle at which the file G is held across the saw 13 is indicated. On the plate S also are straight graduations a, and a corresponding pointer, '11, is on the top of the block E, where coming in contact with the face of the clamp A, operates as a gage for the depth. of the saw teeth.

H represents the file-frame, consisting of a horizontal blade, H, having its lower edge convex, as shown at l, to correspond with the curve of the common three-cornered file G, thereby making the under side of the blade H and the lower edge of the file G parallel with each other, so that the said file G will out the same depth at one as at the other end. A shank, H is firmly welded or otherwise secured at right angles to the blade H, and through the lower end of said shank H and parallel with the blade H, is passed a screwbolt, l, having a handle, 1 that is designed for tightening the file G in the said frame H. In the inner end of the bolt Z is a hole, 1 for receiving the end of the file G. The other end of the file G is held in position by a dog, H that slips on the blade H, and is held and adjusted by a set-screw, m, by which the file G can be adjusted or centered so as to make the bottom edge of said file G parallel with the bottom edge of the frame-blade H.

Through the lower end of the dog 11 is a rod, m, having a handle, m on the outer end thereof, and the inner end of said rod m has a fiat-projection, m against which the fiat face of the file Glies, so that the latter may not turn, and has also a hole, m, to receive-the pointot' the file G. Said rod m thus serves as a guide for the position of the said file G. The rod m is held in position in the dog H by a pin, m passed through said rod m against the inner face of the dog H and on the innerface of the dog H" is a dial or indicator, I, to which the pin m serves as a pointer, thus showing the operator the position or angle at which the op-.

erating-edge of the file G is placed. To turn the file G over the operator loosens the screwbolt 1 slightly, and then turns the handle on until the pin m indicates the right point on the indicator I.

The frame-blade H has a space out out, as shown at n, on its upper edge to facilitate the introduction of the frame H into and its removal from the clamping-block E,in whose longitudinal grooves k it is heldwithout taking said frame H apart.

, Within the carriage 0, near the front end thereof, is a ratchet attachment, M, consisting of a segmental block, M, pivoted on a screw or stud, 0, and provided with a row of holes,

0, set in a curved line corresponding with the curve of said block M. A rod, M has one end engaged in one of the holes 0 and the other in a hole,p, in the inner perpendicular portion of the arm D, and a reversible dog or pawl, M having slotted oppositely-turned ends q, swings loosely from a stud, q, in the lower end of the block M. I

When the saw-filer is in position, as shown in Fig. l, and file G is pressed down on the saw B,the dog or pawl M presses forward and forces the saw in position for filing the next M3 is drawn back and engages with the next tooth, and so on until each tooth is filed. The

block A and replaced in a reverse position for .filing the intermediate saw-teeth. The feed is regulated by changing the position of rod M in reference to the pivotal point 0 of block M, said feed increasing as the rod is moved nearer said pivotal point.

It will be seen that the outer extremity of the arm D, by'resting on theface of the clamp A, forms a most accurate gage for the depth of the saw-teeth, so that it is impossible to file one tooth deeper-than another, and that the curve in the file-frame blade H and the centering set-screw m enable the operator to ap ply the file with equal effect throughout its whole length.

Having thus fully described my invention, what lclaim as new, and desire to secure by Letters Patent,.is

' l. The combination, with the clamp A and sliding carriage G, of the bent arm D, the block WILLIAM HENRY SHUTTE.

' Witnesses:

CHARLES FLETCHER, P. P. HALLENNAN.

tooth, and when the arm D is raised the pawl carriage G will be removed from the clamping- E, the block M, pivoted at 0 and provided 

